NotesFAQContact Us
Collection
Advanced
Search Tips
50 Years of ERIC
50 Years of ERIC
The Education Resources Information Center (ERIC) is celebrating its 50th Birthday! First opened on May 15th, 1964 ERIC continues the long tradition of ongoing innovation and enhancement.

Learn more about the history of ERIC here. PDF icon

Back to results
Peer reviewed Peer reviewed
ERIC Number: EJ504347
Record Type: CIJE
Publication Date: 1995
Pages: N/A
Abstractor: N/A
Reference Count: 0
ISBN: N/A
ISSN: ISSN-0034-6543
ANOVA: A Paradigm for Low Power and Misleading Measures of Effect Size?
Wilcox, Rand R.
Review of Educational Research, v65 n1 p51-77 Spr 1995
Reviews new techniques for dealing with the problem that slight departures from normality can substantially lower power when means are compared and that a popular measure of effect size can be misleading. Contemporary ways of comparing groups can reveal important differences that are missed by conventional methods based on means. (SLD)
Descriptors: Analysis of Variance, Comparative Analysis, Effect Size, Measurement Techniques, Models, Power (Statistics)
Publication Type: Reports - Evaluative; Journal Articles
Education Level: N/A
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A
Identifiers: Mean (Statistics); Normality Tests